| Autor: |
Atabekyan, L., Zakharova, G., Ogienko, V., Chibisov, A. |
| Zdroj: |
High Energy Chemistry; Sep2002, Vol. 36 Issue 5, p322-325, 4p |
| Abstrakt: |
The kinetics of photocoloration of spiro compounds under continuous UV irradiation were analyzed. Using spirooxazine as an example, it was shown that the shape of the kinetic curve of spirooxazine absorbance in the course of photocoloration is the most sensitive to the photocoloration quantum yield and the molar decadic absorption coefficient of the colored form in the visible spectral region. The photocoloration rate was found to increase with increasing temperature as a result of the temperature dependence of the photocoloration quantum yield. The activation energies for photocoloration E‡ col and for thermal bleaching E‡ bleach were determined for a series of spiropyrans, and it was found that E‡ col < E‡ bleach. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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